What does Free Water (FW) refer to in a measured volume?

Free Water (FW) refers to the water that is present in a container, which is not mixed or suspended within the liquid hydrocarbons. This water can typically settle to the bottom of a tank or vessel, beneath the oil or liquid product. It is significant in the context of tankerman operations because the presence of free water can affect the quality and quantity of the product being transferred, stored, or sold. Being able to measure and account for free water is crucial in ensuring accurate calculations for loading and unloading operations.

Understanding this concept is vital, as it allows for proper management of liquid cargoes and assures compliance with regulations regarding product handling and environmental protection. This definition of free water distinguishes it from other types of water related to liquids, such as water in suspension, which is mixed within the product and doesn’t settle out like free water does. Other options refer to different contexts of water management or contamination, which are not relevant to the specific measurement of free water in this scenario.